We stayed as a family of five and had plenty of space. As others have said it is a little out from the main sights in the city but we were well aware of that at booking. (If we were coming to Bangkok for the first time it would have been a hassle). There is very little nearby - Supermarket is about 15 minute walk which was a bit tough in the heat.
The building felt safe and the apartment was well laid out with good views. Some elements probably need a refresh (worktops, kitchen equipment) but it was clean and suited our needs for a few days. Close to the train station (dark red line) which was useful to get to DMK airport (avoiding traffic). Excellent communication throughout, thanks for having us.